Help, i have a 2002 Bugeye with mods and mapped and it has always had a little hesitation when driving normally but is fine on boost but when the car revs come down from boost 9/10 the car will just die on me or get close to doing it. It is a struggle to re start after. Under normal driving the car ticks over fine and won't cut out only after full boost. I feel it could be a fueling issue somewhere as no obvious air leaks and no light on. Any ideas or if someone has had the same problem would be great to know what is causing this.
Many Thanks Mark

 

what ecu?

 

Hi there thank you for your reply. As far as i know it is an open source if thats correct.